header{
	height: 48px;
	width: 100%;
	background: url(../img/banner_exam.png) no-repeat 0 48px;
	position: relative;
}
.top{
	width:100%;
	height: 48px;
	background-color: #323232;
}
.top_con{
	width: 1100px;
	height: 48px;
	margin: 0 auto;
}
.top img{
	float: left;
	position: relative;
	z-index: 2;
}
.top .top_r{
	width: 275px;
	height: 48px;
	line-height: 48px;
	float: right;
	display: flex;
	justify-content: space-around;
}
.top .top_r span{
	color: #6b6b6b;
}
.top .icon_first i{
	color: #6e6e6e;
	font-size: 12px;
	font-style: normal;
}
.top .top_c li{
	width: 86px;
	line-height: 48px;
	float: left;
	cursor: pointer;
	font-size: 13px;
	text-align: center;
}
.top .top_c li a{
	color: #efefef;
}
.top .top_c li:first-child{
	margin-left: 32px;
}
.banner{
	height: 228px;
	background: url(../img/banner_exam.png) no-repeat;
	background-size: 100% 100%;
	position: relative;
}
.banner_b{
	height: 30px;
	width: 100%;
	background-color: rgba(0,0,0,.6);
	position: absolute;
	bottom: 0;
}
.banner_b .banner_b_con{
	width: 1100px;
	height: 30px;
	margin: 0 auto;
}
.banner_b .banner_b_con span{
	line-height: 30px;
	float: left;
	color: #fdfdfd;
	font-size: 12px;
	cursor: pointer;
}
.banner_b .banner_b_con span:nth-child(2){
	margin-left: 8px;
}
.banner_b .banner_b_con span:nth-child(3){
	margin-left: 12px;
}